CN113113554B - Packaging substrate, display panel and manufacturing method of display panel - Google Patents
Packaging substrate, display panel and manufacturing method of display panel Download PDFInfo
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- CN113113554B CN113113554B CN202110377592.9A CN202110377592A CN113113554B CN 113113554 B CN113113554 B CN 113113554B CN 202110377592 A CN202110377592 A CN 202110377592A CN 113113554 B CN113113554 B CN 113113554B
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- 239000000758 substrate Substances 0.000 title claims abstract description 112
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 76
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 230000000903 blocking effect Effects 0.000 claims abstract description 71
- 239000003292 glue Substances 0.000 claims abstract description 70
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000011159 matrix material Substances 0.000 claims description 41
- 230000004888 barrier function Effects 0.000 claims description 39
- 239000004793 Polystyrene Substances 0.000 claims description 38
- 229920002223 polystyrene Polymers 0.000 claims description 36
- 238000002161 passivation Methods 0.000 claims description 29
- 239000000945 filler Substances 0.000 claims description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 239000000853 adhesive Substances 0.000 abstract description 8
- 230000001070 adhesive effect Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 33
- 238000001723 curing Methods 0.000 description 30
- 230000008569 process Effects 0.000 description 9
- 238000005538 encapsulation Methods 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000003475 lamination Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 238000001029 thermal curing Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
An embodiment of the application discloses a package substrate, a display panel and a manufacturing method thereof, wherein the package substrate of an embodiment comprises: a cover plate; the packaging structure comprises a cover plate and a packaging area, wherein the cover plate is arranged on the central area, the packaging area surrounds the central area, a blocking dam in a closed pattern is arranged on the packaging area, filling glue is arranged on the central area, the width of the cross section of the blocking dam perpendicular to the cover plate is smaller than a preset width threshold value, and the blocking dam keeps unchanged in form when the packaging substrate and the display substrate are paired and the filling glue is solidified. According to the embodiment of the application, the novel blocking dam is arranged, so that the cross section width of the blocking dam is limited within the width threshold range to meet the requirement of a narrow frame, meanwhile, the blocking dam cannot deform after being pressed, the selectable range of the filling adhesive is increased, the problems in the prior art are solved, the packaging effect is effectively improved, and the method has a wide application prospect.
Description
Technical Field
The invention relates to the technical field of display. And more particularly, to a package substrate, a display panel, and a method of manufacturing the same.
Background
An OLED (Organic LIGHT EMITTING Diode) display device has a series of advantages of an all-solid structure, self-luminescence, fast response speed, high brightness, full viewing angle, flexible display and the like, so that the OLED (Organic LIGHT EMITTING Diode) display device becomes a display device with great competitive power and good development prospect at present.
However, because the OLED device is corroded and damaged under the action of water vapor and oxygen, the problem of packaging the OLED device is more and more prominent, and particularly, under the development trend of the display industry on the narrow frame of the display device, how to solve the problem of packaging while realizing the requirement of the narrow frame is a problem to be solved.
Disclosure of Invention
In order to solve at least one of the above problems, a first embodiment of the present invention provides a package substrate, including:
a cover plate;
The packaging structure comprises a central area arranged on the cover plate and a packaging area surrounding the central area, wherein a blocking dam in a closed pattern is arranged on the packaging area, and a filling adhesive is arranged on the central area, wherein
The width of the cross section of the blocking dam perpendicular to the cover plate is smaller than a preset width threshold value, and the blocking dam keeps unchanged in form when the packaging substrate and the display substrate are paired and the filling glue is solidified.
In a specific embodiment, the barrier dam is a cured epoxy resin, and the curing mode is one of thermal curing, ultraviolet curing and ultraviolet curing.
In a specific embodiment, the barrier dam includes at least one of a black matrix and polystyrene.
In a specific embodiment, the blocking dam includes a black matrix and polystyrene sequentially stacked on the cover plate, and an orthographic projection of the black matrix on the cover plate covers an orthographic projection of the polystyrene on the cover plate.
In a specific embodiment, the black matrix and the polystyrene are formed by using a mask plate with the same annular opening, the orthographic projection of the black matrix on the cover plate covers the orthographic projection of the polystyrene on the cover plate, and the cross-sectional width of the blocking dam parallel to the cover plate gradually decreases in a direction from the near to the far from the cover plate.
In a specific embodiment, the package substrate further includes a passivation layer covering the barrier dam and the central region, and the filling glue is disposed on the passivation layer corresponding to the central region.
In a specific embodiment, the filler gum comprises an epoxy or acrylic.
A second embodiment of the present invention provides a display panel comprising a display substrate for a pair of boxes and the package substrate according to the first embodiment of the present invention, wherein
The display substrate comprises a substrate, a display area and a non-display area, wherein the display area is arranged on the substrate, the non-display area surrounds the display area, the display area corresponds to the central area, and the non-display area corresponds to the packaging area.
A third embodiment of the present invention provides a method for manufacturing a display panel, including:
forming a blocking dam in a closed pattern on a packaging area of a cover plate, wherein the width of the cross section of the blocking dam perpendicular to the cover plate is smaller than a preset width threshold value;
forming a filling glue on a central area of the cover plate to form a packaging substrate, wherein the packaging area surrounds the central area;
forming a display substrate on a substrate, wherein the display substrate comprises a display area and a non-display area, the display area is formed on the substrate, the non-display area surrounds the display area, the display area corresponds to the central area, and the non-display area corresponds to the packaging area;
the packaging substrate and the display substrate are opposite to each other, and the blocking dam keeps unchanged form;
and curing the filling glue, wherein the form of the barrier dam is kept unchanged.
In one embodiment, the forming the blocking dam in a closed pattern on the encapsulation area of the cover plate further includes:
forming a first adhesive material in a closed pattern on a packaging area of the cover plate;
Solidifying the first glue material to form the barrier dam;
Or alternatively
The forming the blocking dam in a closed pattern on the packaging area of the cover plate further comprises:
forming a black matrix in a closed pattern on a packaging region of the cover plate to form a barrier dam;
Or alternatively
Forming polystyrene in a closed pattern on a packaging region of the cover plate to form a barrier dam;
Or alternatively
And forming a black matrix in a closed pattern on the packaging region of the cover plate, and forming polystyrene on the black matrix to form the barrier dam.
In a specific embodiment, after the forming of the blocking dam in a closed pattern on the package region of the cover plate, before the forming of the filling glue on the central region of the cover plate to form the package substrate, the manufacturing method further includes: forming a passivation layer covering the barrier dam and the central region;
the forming a filling glue on the central area of the cover plate to form a package substrate further comprises: and forming filling glue on the passivation layer corresponding to the central area to form the packaging substrate.
The beneficial effects of the invention are as follows:
Aiming at the existing problems at present, the invention establishes a packaging substrate, a display panel and a manufacturing method thereof, limits the section width of the blocking dam within the width threshold range by arranging a new blocking dam structure so as to realize the narrow frame requirement, simultaneously ensures that the blocking dam cannot deform after being pressed, and improves the selectable range of filling glue, thereby overcoming the problems in the prior art, effectively improving the packaging effect and having wide application prospect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 illustrates a schematic structure of a package substrate according to an embodiment of the present application.
Fig. 2 shows a schematic structural diagram of a package substrate in which a barrier Dam is a cured Dam material according to an embodiment of the present application.
Fig. 3 shows a schematic structure of a package substrate according to still another embodiment of the present application.
Fig. 4a-4c show schematic structural diagrams of a package substrate according to yet another embodiment of the present application.
Fig. 5 shows a schematic structural diagram of a package substrate according to still another embodiment of the present application.
Fig. 6 is a flow chart illustrating a method for manufacturing a display substrate according to an embodiment of the application.
Fig. 7a-7c are schematic diagrams illustrating a method for manufacturing a display substrate according to yet another embodiment of the application.
Fig. 8a-8d show schematic diagrams of a method of manufacturing a display substrate according to an embodiment of the application.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to preferred embodiments and the accompanying drawings. Like parts in the drawings are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and that this invention is not limited to the details given herein.
It should be noted that, as used herein, "on … …", "formed on … …", and "disposed on … …" may mean that one layer is directly formed or disposed on another layer, or that one layer is indirectly formed or disposed on another layer, i.e., that other layers are present between the two layers.
The OLED packaging methods commonly used at present include a die-bonding package, a Frit package, a glue packaging (Dam & Fill), and the like. The Dam and Fill process uses resin with higher viscosity to form a Dam glue frame, and resin with lower viscosity to form Fill glue, wherein Dam is used for blocking Fill overflow and controlling the packaging range; the Fill is used for filling the interior of the Dam glue frame, so that the Fill glue is fully coated on the OLED area after being pressed, and the packaging purpose is achieved. The Dam & Fill packaging process is easy to adjust and controllable, and is widely applied to top emission and transparent large-size OLED packaging.
Nowadays, a narrow bezel is a trend of development of the modern display industry, and a screen with the narrow bezel is more and more popular with consumers. However, in practical application, the Dam is difficult to narrow after lamination due to the limitation of Dam materials and equipment processes, and the width of the Dam is larger than 2mm; meanwhile, the filling glue needs to be matched with the curing condition of Dam, so that the selectivity of the filling glue material is limited.
To this end, as shown in fig. 1, one embodiment of the present invention provides a package substrate including:
A cover plate 10;
a central region 22 arranged on the cover plate and a packaging region surrounding the central region, wherein a blocking dam 20 with a closed pattern is arranged on the packaging region, and a filling adhesive is arranged on the central region, wherein
The width of the cross section of the blocking dam 20 perpendicular to the cover plate 10 is smaller than a preset width threshold, and the shape of the blocking dam 20 is unchanged when the package substrate and the display substrate are paired and the filling glue is solidified.
Aiming at the current existing problems, the width of the cross section of the blocking dam perpendicular to the cover plate is limited within the range of the width threshold value by the packaging substrate provided by the embodiment so as to meet the requirement of a narrow frame, and in the embodiment, the width threshold value is 100um-1500um, so that the size requirement of the display panel on the narrow frame can be met. The blocking dam is further prevented from deforming after being pressed, and the selectable range of the filling glue is increased, so that the problems in the prior art are solved, the packaging effect is effectively improved, and the method has wide application prospect.
In an alternative embodiment, as shown in fig. 2, the barrier Dam is a cured Dam material 200, and the following is a specific description of an example of manufacturing the package substrate of this embodiment:
First, a first adhesive material with a closed pattern is formed on a packaging area of the cover plate.
In this embodiment, the Dam material is coated on the cover plate, and specifically, the Dam material is epoxy resin, and it should be noted that, in this embodiment, the specific choice of the Dam material is not limited, and a person skilled in the art should select an appropriate Dam material according to the actual application requirement.
And secondly, curing the first adhesive material to form the barrier dam.
In this embodiment, the first glue epoxy resin is cured, specifically, the curing mode includes thermal curing, ultraviolet curing (UV) or ultraviolet thermal curing (uv+), and the thickness of the Dam material after curing is fixed, that is, a person skilled in the art can select the width of the Dam material after curing according to practical application requirements, for example, according to the requirements of a narrow frame, when the Dam material after curing is 100um, the Dam material is coated according to the width, and when curing, the Dam material is not too wide due to the lamination with the display substrate to the box, that is, the form is kept unchanged, so as to solve the problems in the prior art.
It should be noted that, in this embodiment, the curing method is not limited, and those skilled in the art should select the curing method according to the actual application requirement.
And finally, forming filling glue on the central area of the cover plate to form the packaging substrate.
In this embodiment, the filling glue is coated on the central area of the cover plate, specifically, the filling glue may be epoxy resin or acrylic acid, and the material of the filling glue is not limited in this embodiment, and a person skilled in the art should select a proper filling glue material according to practical application requirements.
It should be noted that, since the Dam material is subjected to the pre-curing treatment, curing of the Dam material does not affect curing of the underfill, thereby increasing the selectable range of the underfill.
Thus, the package substrate of the present embodiment is formed, and the requirement of the display panel for the narrow frame is achieved by using the Dam material 200 after curing as the barrier Dam and limiting the cross-sectional width of the barrier Dam within the width threshold range.
Still further, when the package substrate of the present embodiment is used to manufacture a display panel, the display substrate with the OLED and the prepared package substrate are vacuum-pressed to form a box and the filling glue is cured.
In this embodiment, the display substrate includes a substrate, and a display region and a non-display region surrounding the display region, which are disposed on the substrate, the display region corresponds to the central region, and the non-display region corresponds to the package region. Specifically, the display substrate and the packaging substrate are subjected to vacuum lamination, and because the Dam glue is cured, the width of the Dam glue is not changed any more, namely the form is kept unchanged, and meanwhile, the filling glue is blocked from overflowing, so that the filling glue fully fills the gap after the box alignment, and the package glass is prevented from being crushed due to the gravity problem.
And then, curing the filling glue to complete packaging of the display substrate, thereby forming the display panel. In this embodiment, since the Dam material is cured in advance, the Dam material is not deformed during the alignment with the display substrate, and is not deformed during curing of the filler.
To further enhance the package stability, in an alternative embodiment, as shown in fig. 3, the package substrate further includes a passivation layer 24 covering the barrier dam and the central region, and the filling compound is disposed on the passivation layer corresponding to the central region.
In this embodiment, the passivation layer 24 is disposed on the cured Dam material and the central region, so as to enhance the capability of the package substrate for blocking water and oxygen, thereby effectively improving the package effect.
The specific description will be given by taking the manufacturing of the package substrate as an example:
after forming the cured Dam material in a closed pattern on the encapsulation region of the cover plate, a passivation layer is formed to cover the cured Dam material and the central region before forming a filler paste on the central region of the cover plate to form an encapsulation substrate.
Specifically, the passivation layer may be an inorganic passivation layer such as SiNx, and the material of the passivation layer is not limited in the present application, and a person skilled in the art should select an appropriate passivation layer according to actual application requirements, so as to realize a function of blocking water and oxygen as a selection basis, which is not described herein.
And then, forming filling glue on the passivation layer corresponding to the central area to form the packaging substrate.
In this embodiment, a filling paste is coated on the passivation layer in the central region to fill the gap and protect the display substrate when the display substrate is paired with the box. The specific embodiments refer to the foregoing embodiments, and are not repeated herein.
In another alternative embodiment, as shown in fig. 4a, the barrier dam includes a black matrix 202 (BM) disposed on the cover plate, and the cross-sectional width of the barrier dam can be limited within a width threshold by using the barrier dam formed of the black matrix, thereby realizing the requirement of the display panel for a narrow bezel. Meanwhile, the black matrix is used for forming the blocking dam, so that the curing of the filling glue is not affected, and the selectable range of the filling glue is improved.
In another alternative embodiment, as shown in fig. 4b, the barrier rib includes polystyrene 204 (PS material) disposed on the cover plate, and the cross-sectional width of the barrier rib can be limited within a width threshold by using the barrier rib formed of polystyrene, thereby realizing the requirement of the display panel for a narrow bezel. Meanwhile, the use of polystyrene to form the blocking dam does not affect the curing of the filling glue, so that the selectable range of the filling glue is improved.
In order to further improve the blocking capability of the blocking dam against the filling glue, in an alternative embodiment, as shown in fig. 4c, the blocking dam includes a combined structure 206 of a Black Matrix (BM) and polystyrene (PS material) sequentially stacked on the cover plate, and the following is specifically described by taking the package substrate for manufacturing the embodiment as an example:
First, a black matrix material is coated on a cover plate, and photolithography is performed through a mask plate having an annular opening, so that a cross-sectional width gradually changes from the near to the far direction from the cover plate in a direction parallel to the cover plate. Specifically, the opening width of the mask plate with the annular opening is more than or equal to 100um, and the thickness of the black matrix is more than 1um.
Next, polystyrene covering the black matrix is coated on the cover plate, and patterning of the polystyrene is achieved by photolithography again with the mask plate forming the annular opening of the black matrix structure, so that polystyrene is formed on the black matrix to form the barrier dam. Specifically, the overall thickness of the black matrix and polystyrene in the stacked arrangement is greater than 4um.
The front projection of the black matrix on the cover plate covers the front projection of the polystyrene on the cover plate, and the cross section width of the blocking dam parallel to the cover plate is gradually reduced in the direction from the near to the far from the cover plate.
Since polystyrene has elasticity as compared to the black matrix, the barrier dam formed by the combination of the black matrix and polystyrene can more effectively block the filler paste. Finally, a filling glue is formed on the central area of the cover plate to form the packaging substrate.
In this embodiment, the filling glue is coated on the central area of the cover plate, and the detailed description will not be repeated again with reference to the foregoing embodiment.
Therefore, the package substrate of the embodiment is formed, the cross section width of the blocking dam formed by the black matrix and the polystyrene can be limited within the width threshold range, and the requirement of the display panel on the narrow frame is met. Meanwhile, the black matrix and the polystyrene are used for forming the blocking dam, so that the curing of the filling glue is not affected, and the selectable range of the filling glue is improved. In addition, the blocking dam formed by the black matrix and the polystyrene has a simple structure, can be prepared in batch in advance, and effectively improves the packaging speed and the packaging efficiency of the display panel.
Still further, when the package substrate of the present embodiment is used to manufacture a display panel, the display substrate with the OLED and the prepared package substrate are vacuum pressed and the filling glue is cured, thereby forming the display panel. The specific embodiments refer to the foregoing embodiments, and are not repeated herein.
The black matrix or the polystyrene or the blocking dam formed by the black matrix and the polystyrene is not influenced by the press fit of the box or the curing of the filling glue, so that the width range of the blocking dam can be limited, and deformation can not occur in the box matching process and the curing process of the filling glue, namely the shape is kept unchanged; meanwhile, the overflow of the filling glue is blocked, so that the filling glue fully fills the gap after the box alignment, and the package glass is prevented from being crushed due to the gravity problem.
To further enhance the package stability, in an alternative embodiment, as shown in fig. 5, the package substrate further includes a passivation layer 24 covering the barrier dam and the central region, and the filling compound is disposed on the passivation layer corresponding to the central region.
In this embodiment, the passivation layer is disposed on the basis of the barrier dam formed by using the black matrix, or the polystyrene, or the stacked structure formed by combining the black matrix and the polystyrene, so that the capability of blocking water and oxygen of the package substrate can be enhanced, and the package effect is effectively improved.
The specific description will be given by taking the manufacturing of the package substrate as an example:
After the blocking dam in a closed pattern is formed on the packaging region of the cover plate, a passivation layer covering the blocking dam and the central region is formed before the filling glue is formed on the central region of the cover plate to form the packaging substrate.
And on the basis of a blocking dam formed by using a black matrix or polystyrene or a laminated structure formed by combining the black matrix and the polystyrene, a passivation layer covering the blocking dam and the central area is formed, so that the capability of blocking water and oxygen of the packaging substrate can be enhanced, and the packaging effect is effectively improved.
And then, forming filling glue on the passivation layer corresponding to the central area to form the packaging substrate.
In this embodiment, a filling paste is coated on the passivation layer in the central region to fill the gap and protect the display substrate when the display substrate is paired with the box. The specific embodiments refer to the foregoing embodiments, and are not repeated herein.
An embodiment of the present application provides a display panel including a display substrate for a case and the above-described package substrate, and thus, the display panel can realize the design requirement of a narrow bezel.
The display substrate comprises a substrate, a display area and a non-display area, wherein the display area is arranged on the substrate, the non-display area surrounds the display area, the display area corresponds to the central area, and the non-display area corresponds to the packaging area.
The display panel is an electroluminescent diode display panel.
Based on the display panel, as shown in fig. 6, an embodiment of the present application provides a manufacturing method for manufacturing the display panel, which includes:
as shown in fig. 7a, a blocking dam 20 in a closed pattern is formed on the packaging area of the cover plate 10, and the width of a section of the blocking dam 20 perpendicular to the cover plate 10 is smaller than a preset width threshold value;
as shown in fig. 7b, a filling paste 26 is formed on a central region of the cover plate to form a package substrate, the package region surrounding the central region;
forming a display substrate on a substrate, wherein the display substrate comprises a display area and a non-display area, the display area is formed on the substrate, the non-display area surrounds the display area, the display area corresponds to the central area, and the non-display area corresponds to the packaging area;
As shown in fig. 7c, the barrier rib 20 maintains a shape of the package substrate and the display substrate 30; the filler glue 26 is cured and the barrier dam 20 remains unchanged in form.
In this embodiment, the width of the cross section of the blocking dam perpendicular to the cover plate of the packaging substrate is limited within the width threshold range so as to meet the requirement of a narrow frame, and meanwhile, the blocking dam is prevented from deforming during pressing and curing of the filling glue, so that the selectable range of the filling glue is improved, the problems in the prior art are solved, the packaging effect is effectively improved, and the packaging method has a wide application prospect.
In an alternative embodiment, as shown in fig. 2, the forming a blocking dam in a closed pattern on the encapsulation area of the cover plate further includes: forming a first adhesive material in a closed pattern on a packaging area of the cover plate; and curing the first adhesive material to form the barrier dam.
In this embodiment, the requirement of narrow frame is realized by curing the first glue material in advance, and meanwhile, the effect of the box and the cured filling glue is avoided, so that the selection range of the filling glue is improved.
In yet another alternative embodiment, as shown in fig. 4a, the forming the blocking dam in a closed pattern on the encapsulation area of the cover plate further includes: and forming a black matrix in a closed pattern on the packaging region of the cover plate to form a barrier dam.
Similarly, as shown in fig. 4b, the forming the blocking dam in a closed pattern on the encapsulation area of the cover plate further includes: and forming polystyrene in a closed pattern on the packaging area of the cover plate to form a blocking dam.
Similarly, as shown in fig. 4c, the forming the blocking dam in a closed pattern on the encapsulation area of the cover plate further includes: and forming a black matrix in a closed pattern on the packaging region of the cover plate, and forming polystyrene on the black matrix to form the barrier dam.
In this embodiment, the black matrix, or the polystyrene, or the barrier dam formed by the black matrix and the polystyrene is not affected by the lamination of the box, is not affected by the curing of the filling glue, and can define the width range of the barrier dam, and is not deformed in the box-aligning process and the filling glue curing process.
In order to further improve the stability of the package, as shown in fig. 8a, after the forming of the blocking dam 20 in a closed pattern on the package region of the cover plate 10, before the forming of the filling glue 26 on the central region of the cover plate 10 to form the package substrate, the manufacturing method further includes: forming a passivation layer covering the barrier dam 20 and the central region as shown in fig. 8 b;
Further, as shown in fig. 8c, a filling glue 26 is formed on the passivation layer corresponding to the central region to form a package substrate; as shown in fig. 8d, the barrier rib 20 maintains the shape of the package substrate and the display substrate 30; the filler glue 26 is cured and the barrier dam 20 remains unchanged in form.
In this embodiment, by disposing the passivation layer on the basis of forming the barrier dam, the capability of the package substrate for blocking water and oxygen can be further enhanced, so that the package effect is effectively improved.
The embodiment aims at the existing problems at present, and provides a manufacturing method of a display panel, by setting a new blocking dam structure, limiting the cross section width of the blocking dam within the width threshold range so as to realize narrow frame requirements, simultaneously enabling the blocking dam not to deform after lamination, and improving the selectable range of filling glue, thereby making up the problems in the prior art, effectively improving the packaging effect, and having wide application prospect.
Meanwhile, an embodiment of the application also provides a display device which comprises the display panel. The display device can be any product or component with display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame or a navigator, and the application is not limited to this.
It is further noted that in the description of the present application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It should be understood that the foregoing examples of the present invention are provided merely for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention, and that various other changes and modifications may be made therein by one skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (5)
1. A display panel is characterized by comprising a display substrate and a narrow-edge packaging substrate, wherein
The narrow-side package substrate comprises a cover plate; the packaging area is provided with a blocking dam in a closed pattern, the central area is provided with filling glue,
The display substrate comprises a substrate, a display area and a non-display area, wherein the display area is arranged on the substrate, the non-display area surrounds the display area, the display area corresponds to the central area, the non-display area corresponds to the packaging area,
The width of the cross section of the blocking dam perpendicular to the cover plate is smaller than a preset width threshold, the shape of the blocking dam is unchanged when the packaging substrate and the display substrate are paired and the filling glue is solidified, and the preset width threshold is 100um-1500um;
The blocking dam comprises a black matrix and polystyrene which are sequentially stacked on the cover plate, and orthographic projection of the black matrix on the cover plate covers orthographic projection of the polystyrene on the cover plate;
The black matrix and the polystyrene are formed by a mask plate with the same annular opening, the orthographic projection of the black matrix on the cover plate covers the orthographic projection of the polystyrene on the cover plate, and the cross section width of the blocking dam parallel to the cover plate is gradually reduced in the direction from the near to the far from the cover plate;
the packaging substrate further comprises a passivation layer covering the blocking dam and the central area, the filling glue is arranged on the passivation layer corresponding to the central area, and the thickness of the blocking dam is larger than that of the passivation layer and larger than that of the filling glue in the direction perpendicular to the display substrate.
2. The display panel of claim 1, wherein the filler paste comprises an epoxy or an acrylic.
3. A method of making the display panel of claim 1, comprising:
forming a blocking dam in a closed pattern on a packaging area of a cover plate, wherein the width of the cross section of the blocking dam perpendicular to the cover plate is smaller than a preset width threshold value;
forming a filling glue on a central area of the cover plate to form a packaging substrate, wherein the packaging area surrounds the central area;
forming a display substrate on a substrate, wherein the display substrate comprises a display area and a non-display area, the display area is formed on the substrate, the non-display area surrounds the display area, the display area corresponds to the central area, and the non-display area corresponds to the packaging area;
the packaging substrate and the display substrate are opposite to each other, and the blocking dam keeps unchanged form;
and curing the filling glue, wherein the form of the barrier dam is kept unchanged.
4. The method of claim 3, wherein,
The forming the blocking dam in a closed pattern on the packaging area of the cover plate further comprises:
and forming a black matrix in a closed pattern on the packaging region of the cover plate, and forming polystyrene on the black matrix to form the barrier dam.
5. The method according to claim 3 or 4, wherein,
After the blocking dam with a closed pattern is formed on the packaging area of the cover plate, before the filling glue is formed on the central area of the cover plate to form the packaging substrate, the manufacturing method further comprises the following steps: forming a passivation layer covering the barrier dam and the central region;
the forming a filling glue on the central area of the cover plate to form a package substrate further comprises: and forming filling glue on the passivation layer corresponding to the central area to form the packaging substrate.
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